檢查 Hashtable 是否在 C# 中包含特定值
如下所示,檢查 Hashtable 是否包含特定值:
示例
using System; using System.Collections; public class Demo { public static void Main(){ Hashtable hash = new Hashtable(); hash.Add("1", "A"); hash.Add("2", "B"); hash.Add("3", "C"); hash.Add("4", "D"); hash.Add("5","E"); hash.Add("6", "F"); hash.Add("7", "G"); hash.Add("8","H"); hash.Add("9", "I"); hash.Add("10", "J"); Console.WriteLine("Hashtable Key and Value pairs..."); foreach(DictionaryEntry entry in hash){ Console.WriteLine("{0} and {1} ", entry.Key, entry.Value); } Console.WriteLine("Is Hashtable having fixed size? = "+hash.IsFixedSize); Console.WriteLine("If Hashtable read-only? = "+hash.IsReadOnly); Console.WriteLine("The Hashtable consists of the value? = "+hash.ContainsValue("H")); } }
輸出
它會產生以下輸出:
Hashtable Key and Value pairs... 10 and J 1 and A 2 and B 3 and C 4 and D 5 and E 6 and F 7 and G 8 and H 9 and I Is Hashtable having fixed size? = False If Hashtable read-only? = False The Hashtable consists of the value? = True
示例
讓我們看另一個示例:
using System; using System.Collections; public class Demo { public static void Main(){ Hashtable hash = new Hashtable(); hash.Add("One", "Katie"); hash.Add("Two", "John"); hash.Add("Three", "Barry"); hash.Add("Four", "Mark"); hash.Add("Five","Harry"); hash.Add("Six", "Nathan"); hash.Add("Seven", "Tom"); hash.Add("Eight","Andy"); hash.Add("Nine", "Illeana"); hash.Add("Ten", "Tim"); Console.WriteLine("Hashtable Key and Value pairs..."); foreach(DictionaryEntry entry in hash){ Console.WriteLine("{0} and {1} ", entry.Key, entry.Value); } Console.WriteLine("Is Hashtable having fixed size? = "+hash.IsFixedSize); Console.WriteLine("If Hashtable read-only? = "+hash.IsReadOnly); Console.WriteLine("The Hashtable consists of the key? = "+hash.ContainsKey("Seven")); Console.WriteLine("The Hashtable consists of the value? = "+hash.ContainsValue("Illeana")); } }
輸出
它會產生以下輸出:
Hashtable Key and Value pairs... One and Katie Ten and Tim Five and Harry Three and Barry Seven and Tom Two and John Four and Mark Eight and Andy Nine and Illeana Six and Nathan Is Hashtable having fixed size? = False If Hashtable read-only? = False The Hashtable consists of the key? = True The Hashtable consists of the value? = True
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